Over the last 7 years, the border between Israel and Lebanon has remained quiet. Against all odds, in a Middle East experiencing tremendous challenges, Israel and Hezbollah did not trigger a new conflict. To understand this paradox, the monograph explores the mechanisms of deterrence in the competition between both actors. Based on original materials, the author underlines the recent doctrinal innovations on both sides that engendered strategic stability in the area and ventures thoughts on potential evolutions in the near future.